Earnings Per Common Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Numerator Basic and Diluted [Abstract]
Net Income	$ 3,983,000	$ 4,155,000	$ 5,262,335	$ 6,500,545
Dividends on common shares			(4,364,616)	(4,227,814)
Undistributed Earnings	$ 2,527,000	$ 2,744,000	$ 897,000	$ 2,273,000
Percentage allocated to common shares (in hundredths)	99.60%	99.40%	99.60%	99.40%
Undistributed earnings allocated to common shares	$ 2,517,000	$ 2,729,000	$ 894,000	$ 2,261,000
Add: dividends declared allocated to common stock	1,451,000	1,403,000	4,347,000	4,204,000
Net income available to common shares	$ 3,968,000	$ 4,132,000	$ 5,241,000	$ 6,465,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0	13,757	0	4,586
Denominator - Basic [Abstract]
Weighted Average Number of Shares Issued, Basic	7,076,734	7,014,909	7,061,693	6,996,726
Per common share net income [Abstract]
Basic (in dollars per share)	$ 0.56	$ 0.59	$ 0.74	$ 0.92
Diluted (in dollars per share)	$ 0.56	$ 0.59	$ 0.74	$ 0.92
Percentage allocated to common shares - weighted average [Abstract]
Total Weighted Average Common Shares Used In Calculation Of Percentage Allocated To Common Shares	7,104,398	7,053,909	7,089,357	7,035,726
Weighted Average Number Diluted Shares Outstanding Adjustment	7,076,734	7,028,666	7,061,693	7,001,312
Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights	27,664	39,000	27,664	39,000
Unvested non-participating shares outstanding (in shares)	39,000	39,000	39,000	39,000
Unvested participating shares outstanding	28,000	39,000	28,000	39,000
Retained Earnings [Member]
Numerator Basic and Diluted [Abstract]
Net Income	$ 3,983,441	$ 4,155,136	$ 5,262,335	$ 6,500,545
Dividends on common shares	$ (1,456,000)	$ (1,411,000)	$ (4,364,616)	$ (4,227,814)